Large Sky Area Multi-Object Fiber Spectroscopic Telescope
DATA RELEASE 9 v2.0
2011.10.24-2021.06.30
v1.1 v1.0 v0
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Low Resolution

Observed Plates: 5,533
Total Spectra: 10,809,336
Star: 10,495,781
Galaxy: 238,558
QSO: 74,997
AFGK Stellar Parameters: 6,921,466
M Giants,Dwarfs and Subdwarfs: 798,138
Line indices of A Type Stars:626,413
WD Star Catalog: 14,691
CV Star Catalog: 482
Galaxy Population Synthesis Catalog: 23,681
Qso Emission line Feature Catalog: 18,142
Observed
Plates		 Total Spectra Star Galaxy QSO AFGK Stellar
Parameters		 M Giants,Dwarfs
and Subdwarfs		 Line indices of
A Type Stars		 WD Star
Catalog		 CV Star
Catalog		 Galaxy Population
Synthesis Catalog		 Qso Emission line
Feature Catalog
Pilot survey
(20111024-20120617)
 404 871,759 860,917 9,295 1,547 408,352 84,701 65,068 1,398 34 12 693
First year survey
(20120928-20130603)
 812 1,558,378 1,538,354 13,773 6,251 905,107 65,323 77,281 1,295 53 159 2,325
Second year survey
(20130910-20140603)
 732 1,530,433 1,492,521 31,516 6,396 1,098,049 78,280 74,806 1,152 46 2,437 2,822
Third year survey
(20140910-20150530)
 738 1,567,951 1,530,932 27,124 9,895 1,071,727 106,290 86,476 1,646 54 2,578 2,304
Forth year survey
(20150912-20160602)
 776 1,566,772 1,510,538 41,315 14,919 1,048,039 97,221 104,312 2,107 87 4,428 2,069
Fifth year survey
(20160909-20170616)
 693 1,221,121 1,170,807 35,582 14,732 766,938 98,120 80,365 2,367 71 4,998 5,018
Sixth year survey
(20170919-20180518)
 418 796,678 768,330 20,612 7,736 513,215 74,806 49,095 1,599 57 2,653 1,209
Seventh year survey
(20181005-20190608)
 349 611,087 585,341 21,633 4,113 391,051 67,330 40,033 1,455 24 2,418 470
Eighth year survey
(20191023-20200527)
 285 515,842 489,390 21,139 5,313 340,058 58,123 27,104 969 39 1,951 737
Ninth year survey
(20200918-20210612)
 326 569,315 548,651 16,569 4,095 378,930 60,853 28,964 703 31 2,047 495
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Medium Resolution

Low-resolution data Medium-resolution non time-domain data Medium-resolution time-domain data Total
Total spectra 10,809,336 1,922,760 6,718,023 19,450,119
Star parameter 6,921,579 910,320 786,632 8,618,531

Standard acknowledgement

Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope LAMOST) is a National Major Scientific Project built by the Chinese Academy of Sciences. Funding for the project has been provided by the National Development and Reform Commission. LAMOST is operated and managed by the National Astronomical Observatories, Chinese Academy of Sciences.